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Patented Dec. 2, 1919.

ATTORNEY.

' HENRY CALLSEN, 6r BnoO-KLYN, NEW YORK,

DENTAL BRIDGE.

Specification of Letters Patent. Patented Dec. 2,1919.

Application filed August 23, 1919. Serial No. 319,4l08.

To all whom it may concern:

Be it known that I,HENRY CALLsEN, a citizen of the United States, residing at Brooklyn, Kings county, and New York State, have invented certain new and use ful Improvements in Dental Bridges, of which the following is a specification.

. This invention relates to dental bridges and its object is to anchor the bridge at each.

end in adjacent teeth by embedding a part of the improved device in each tooth, securing the same by means of a metal inlay or attaching. the same by means of a crown and it consists ofa female member consisting of a socket secured to the tooth as above describedand a male member, comprising a resilient wedge, and a stem to be secured to th bridge work and which affords a simple means for inserting or removing the latter for cleaning or to repair the bridge.

These and other objects and details of the invention are more fully described in the following specification, set-forth inthe appended claims and'illustrated in'the ac- For sanitary purposes, it is found very.

necessary that bridg work carrying several teeth and located on sound teeth should be removable so that they be easily cleansed and sterilized. In to this feature a removable bridge affords excellent opportunities. for producing a perfect piece of work or properly repairing the/sameifdamaged or worn.

In the present invention, the female or socket member 10, consists of a-sheet metal frame open at the front and top and having.

the straight back 11, side'wings 12 and sloping bottom 13, the whole being inserted in a correspondingly made cavity in the tooth and cemented therein to form a lining.

It Will be observed'inFig. 1 that by forming the cavity with the sloping rear lower end, no danger results of a near approach to the nerve 15, so that the sound tooth is in no way injurednor jeopardized.

The male member or wedge 16 18 adapted to form one end of the bridge and is -at-- tached to the same by means ofthe-stemlf in any desired manner,and the member is of a shape to correspond with the interior of the socket 10 in which it fits as shown in Fig. 6, the beveled sides fitting against the wings 12, so that it may notbe pulled out when inserted, and at the rear of the member is a spring 18, normally ashort distance from the rear face of the member and soldered or riveted at its lower corner.

When the male member is inserted by means of its reduced lower end and forced downward, the spring 18 bears against the back 11 of the socket member and creates I a certain amount of friction as the wedge is shoved home and by the time the two parts are completely fitted, they are firmly secured together.

When it is desired to remove the bridge the upward pull'of the same will overcome the pressure of the spring 18' and the .male members at each end of the bridge will readily yield.

In the modified form shown in Figs. 4.-

and 5 a' certain amount of space is left. be--- tween the spring 20 and the member21 on account of the two not corresponding inshape on that face and consequently, the friction of the spring does not .take place until the wedge has reached the bottom of the socket, when it holds "the :two parts firmly together. The socket corresponds with the lower corner 22 of the male member and the spring is conse uently compressed I and'the friction results-t erefrom.

Besides providing for a safe socket and non-interference by the inclined bottom 13,

it affords a quick and ready means for .1 cleaning the same when the' bridge is removed. so that no dangerous germs may lodgment about the device. a

It is evident thatthe parts may be otherwise arranged or modified without departing from the essential features above described or from the scope of the appended claims. v

What I claim as new is:

' 1. In a dental bridge, the combination of a socket member attached to a tooth, and a resilient wedge exerting an outward pressure adapted to be secured inthe socket member and to carry a bridge. i p

2. In a dental bridge, the combination of a socket member adapted .to be attached to a tooth, a wedge member adapted to be fitted in the socket and carry one end of the bridge and exert a; longitudinal pressure thereon, and friction means securing the wedge in the socket.

3. In a dental'bridge, the combination of a metal socket member fitted in a tooth, a wedge member with a stem at its lower end to carry the bridge and a spring secured 'to the wedge and adapted to create friction with the socket member.

4. In a dental bridge, the combination of a socket member having a slopin bottom and an open top and front, a we ge mem-' ber having means for carrying a bridge, and a spring to create friction between the wedge and the socket. members and force the wedge ahd bridge outward. v

5. In a dental bridge, the combination of a socket member having a sloping lower side and open at the top and the front wings at the front opening, a wedge member having a stem and adapted not to interfere with the adjacent tooth, and a spring adapted to force the wedge member against the wings.

6. In a dental bridge, the combination of a sheet metal member adapted to form the lining for a socket in a tooth, a wedge membe; adapted to fit in the sheet metal member,

- and a flat spring secured to the latter parallel with its rear face and extending slightly beyond same.

7. In a dental brid e, the combination of a sheet metal lining adapted to fit the socket in a tooth, a wedge member adapted to carry a bridge, a stem for the bridge and depending from the wedge and below the teeth on the said bridge, and a spring secured to the lower side of the wedge, parallel with its rear face and extending beyond the wedge at its lower rear corner.

8. In'a dental bridge, the combination of a tooth having a socket, a wedge having resilient frictional means on its inner face and adapted to force it outward, and a stem depending from the lower end of the wedge and adapted to extend below the adjoining bridge and its teeth. 7

In testimony whereof, I'have signed my name to this specification in the presence of two subscribing witnesses this August 1919.

HENRY CALLSEN.

lVitnesses:

MARIANNE C. CALLsEN, JAMES F. DUHAMEL.. 

